The Sigma series AMP5 is a 200W/Ch five-channel amplifier derived from the AMP2, but with necessary part and layout changes to accommodate its five-channel architecture. Like the AMP2, it utilizes switching technologies for both power supply and amplification stages. A Classé-designed switch mode power supply with Power Factor Correction makes over 1,000W of clean and stable power available while being both compact and efficient. A new class D amplifier topology provides wide dynamic range, smooth and extended frequency response and rich harmonic detail to yield stunning sonic performance. The efficiency of class D adds efficiency, low heat dissipation and relatively small size to the list of the AMP5’s attributes.

All tests un-weighted and 20Hz – 20kHz measurement bandwidth used.
Frequency response   10Hz – 20kHz, -1dB into 4Ω
Output power   200W rms into 8Ω All channels driven
400W rms into 4Ω Any two channels driven*
Harmonic Distortion   0.018% @ 1kHz All channelsdriven
to 1/8th power into 8Ω
Peak Output Voltage   116V peak to peak, 41V RMS no load
116V peak to peak, 41V RMS into 8Ω
Input Impedance   100kΩ Balanced / 50kΩ SE
Voltage gain   29 dB
Input level at clipping   1.4Vrms Balanced/SE
  >80 dB below fundamental into 8Ω SE
Signal to Noise Ratio   -100 dB at peak output into 8Ω (AES17)
Rated power
  200W @ 1/8th power into 8Ω
Mains voltage   100V – 240V, 50/60Hz
Overall Dimensions   Width: 17.00�? (433mm)
Depth (excluding connectors): 14.57�? (370mm)
Height: 3.75�? (95mm)
Net weight   23.1 lb (10.48 kg)
Shipping weight   30.0 lb (13.61 kg)
*each channel supports 400W output into 4 ohms but the AC Mains/power
supply cannot support all channels driven simultaneously at this level, which
would require over 2,500W and only occur under a special test condition.
Every channel easily drives lower impedance loads.



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